lsstack is a Linux implementation of the "pstack" utility from Solaris
lsstack is a command line utility which (efficiently and quickly) prints the call stacks for all threads in a specified process,
with symbolic names for functions, where symbols ar

BuGLe combines a graphical OpenGL debugger with a selection of filters on the OpenGL command stream. The debugger allows viewing of state, textures, framebuffers and shaders, while the filters allow for logging, error checking, video capture and more.

File-Spector is a small, fast and easy to use binary file analyzer and Inspector.
It allows the users to format a complete binary file structure and then use it to read any binary file that matches the specified format.

PlugProxy version is a port forwarder/port debugger written in Java.
PlugProxy is used to forward data from one TCP port to another. This is commonly referred to as "port forwarding." The purpose of this is to invisibly send a request from one site

Introspect on running programme, view and alter object fields and methods. Edit the code of any method at runtime; apply the changes to any combination of objects, such as an array, or a complete class. Complete rewrite underway available Jan 2007.

gSim51 is a powerful, efficient and cool simulator for 8051 code. Its has a text based interface and very efficient commands keeping in line with the unix tradition of short and concise commands that do one thing well. gSim51 has no code or data space lim

DBG is a full-featured PHP Debugger and Profiler. Makes it easier to find problems or bugs in PHP scripts. DBG supports back-tracking, watching variables, viewing arguments passed to all nested function calls at any point of execution. Opensource.

Tool for monitoring of OCI client applications [f.e.: TOAD/TOra, or any OCI-based fat client] interaction with Oracle Database. Monitors SQL statements and values passed/fetched between client application and RDBMS. Consists of simple and nice GUI [C#] and events handler [C++] with quite a lot of OCI hacking. Interface between handlers and tool's GUI is through tailing of XML "pipeline" files in $HOME/.ocimonitor directory. Tool is quite similar to Quest SQLMonitor, which is unable to trace values.